Filter



A. Me. BAE-WGH FILTER Filed Juve 5, 1925 2 Sheets-Sheet Patented Nov. s, .1928.1

UNITED STATES 1,690,358 PaxrEN'r OFFICE.

ABRAHAM M. BABITCH, or FLINT, MICHIGAN, AssIeNon 'ro A C SPARK PLUG CoM- PANY, or FLINT, MICHIGAN, A coMPANY or MICHIGAN.

I.Application filed June 3,

` nection 'with the accompanying drawings, in

which Figure 1 'is a longitudinal section throughl a filter embodying one form of the invention. 4,

Figure 2 yis :a horizontal section on line Figure isaplan view of a filter bag constitiitinga part of the invention;

4 ,Figure14 is a section onv-` line` 4-4 of Fig- Figure 5 is an enlarged View ofa portion of a spacing element.

Referring to the drawings:

10 indicates acontamer or can which may be of sheet metal with a permanently; attached bottom end closure 11. Suitable means may be'provided for securing the container to a base or support, which means comprises, in the formillustrated, bands 12 clampedto the container by bolts 13 and provided with, perforated arms 14 wherebythe entire assembly. may be secured'to `a vehicle dash'or otherv support. The wall of the container is flanged outwardly at the upper end, as indicated at 15, thus providing a seat for the reception of the cover 16 which may be secured to the outwardly flanged portion of the receptacle fbyboltsl. p L y Upon the cover 16 are mounted inlet and outlet fittings 18 'and 19.which comprise internally threaded sleeves secured to the cover by sleeve nuts 20 and 21 shouldered to fit a ainst the lower face of the cover and provided with screw threaded extensions-'22and '23 passing through vapertures in the cover and engaglng the screw threaded' bores of the fittings-18 and 19, respectively.

The member 21 is provided with a central passa e 24 through which filtered material may 4owfnom the interior of the container FILTER.

1926. seriai No. 113,491. Y

desired point byla conduit lea-'ding from the i fitting 19. The member 2,0 is also provided with a central passage 25 permitting the flow of. material to be ltered from any desired source to the'interior of the container.- Member 20 is also formed with a reduced portion at the lower or inner end, thusV providing a shoulder 26 lserving as an abutment against which is fitted an end plate 27, `the end plate being perforated to pass over the reduced end port-ion of the nut 20. TheA exa suitable quality of canton flannel. Itmay be formed from asheet of the material having its edges sewed together as indicated at 33 and with the edge at the larger endfoldedl` over, as -at 34, and stitched down at 35 to provide a hem 36, throu h which a fastening wire may be passed. -he'smaller end of the bag is of ajsize adapted to lit the neck 29 of the sleeve nut 20j and when the parts are assembled the bag' is secured firmly to the neck of thev nut by suitable clamping means, as by-a wire 37.- The length of the bag may be several times that of the space within which it is tolbe positioned in use since its conical or tapering form permits it tobe foldedback and forth the requisite number'of times to formA successive-pockets or annular spaces of successively increasing diameters all lying within the largest portion of the bag. By reference to Figure 1 it willbe seen that the bag, when thus folded, presents a central space 38 Within the vportion of smallest diameterand a vseries of annular pockets 39, 4Q, 41, all on the inlet side of the bag, 4and a second series of pockets 42, 43, 44 and 45 on the opposite or outlet side of the bag. In order to maintain theV folds in positionspacin elements 46, 47, 48, 49 are positioned in tie. pockets 42, 43, 44, 45 respectively. These spacing' elements are tubular and are, of course, suc- 10,` which material may be delivered to any cessively of increasing diameter to provide v clearance between them for the pockets 39, 40, 41, respectively. The spacers will be of sufliciently rigid material for the purpose and may be of sheet metal corrugated, as shown in Figure 2 and on enlarged scale in Figure 5. The corrugations provide channels for the escape of the filtered material as it passes through the Walls of the filter bag.

In the assembly, asillustrated in Figure 1, the spacing elements engage at their upper ends with the plate 27 and are held in position by a second plate 50 engaging the filter bag and acting against the lower ends of the spacing elements. The plate 5() is held in position by the fasteningT wire 31 which passes through a central perforation in the plate. Suitable pressure being applied by the clamping action of the wire 31, the successive folds of the bag are pressed against tlie lower ends of the spacing elements and the latter held firmly in contact with the upper plater 27. The plates 27 and 5() are provided with slots 27', 50"to permit free passage therethrough of the material being filtered. The outer or larger section of the bag 32 is secured by positioning the hem 36 within a channel 51 in a ring 52, as by a fastening wire 53 passed through the hem. The ring 52 may be secured between the cover and the container, as by providing the ring with apertures through which the bolts 17 extend. By this arrangement the tightening up of the bolts 17 secures the cover to the can and also secures the ring 52 in position, suitable gaskets 54, 55, being provided, above and below the ring respectively, to prevent leakage.

In the construction as described, it will be noted that the annular pockets 39, 40, 41 on the inlet side of the filter are wholly open and unobstructed, being maintained distended by the pressure of the material being filtered. Hence they not only permit free flow of the material to be filtered to every part of the surface of the filter bag on the inlet side but also provide ample space for accumulation of residue, thereby affording high capacity and extended life for the filtering body. The corrugated construction of the spacing elements also permits ready discharge of the filtered material which Imay pass through the Walls of the filtering body. I thus secure a very great efficiency and capacity in proportion to the area of the filter body, and also in proportion to the size of the filter as a whole.

It will be understood that various changes and details of construction may he made without departing from the spirit and scope of the invention, and therefore I do not desire to be limited to the specific'structure herein describedvexcept as required by the language of the appended claims in view of the prior art.

I claim:

1. A filter comprising a container, a cover therefor, inlet and outlet connections carried by said cover, a `ring in said container, a tapered filter bag in said container having its 'smaller end secured to said inlet connection and its larger end to said ring, said bag folded back and forth to form a plurality of annular pockets opening alternately on the inlet and outlet sides of said filter, tubular spacers positioned in the pockets on the outlet side, and means for holding said bag and'spacers in assembled relation.

2. Structure as set forth in claim l, said holdingr means comprising end plates, one supported upon the cover, and means for sccuringthe other thereto.

3. A filter comprising an end member having inlet and outlet fittings one of which is centrally disposed, a conical filter bag having its smaller end secured to said central fitting and its larger end secured to said mem ber, the intermediate portion of said bag heingr folded back and forth to form annular pockets, annular distendinL members in said pockets on the outlet side, a support for said distcnding members and means for securing said support to said end member.

f1. A filter comprising a container, a cover therefor, having an outlet fitting and a central inletf fitting, a ring secured to said cover, a conical filter bag having its smaller end secured to said inlet fitting and its larger end to said ring, the intermediate portion of the bag being folded back and forth to form annular pockets, annular spacers in the pockets on the outlet side, and means for clamping said spacers to said cover, whereby the cover, the bag and the spacers form an assembly capable of being inserted into or removed from the container as a unit.

In testimony whereof I affix mv signature.

ABRAHAM M. BBITCH.

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